leading and trailing spaces

[Chris]

Hi,

maybe someone could tell me what command I have to use for remove leading
and trailing spaces.

Is it trim()? Is there any #include or using neccesary?

Thanks

Cheers

Chris

[David Hilsee]

"Chris" <c...@coelle.net> wrote in message
news:HIzt8.24639$vc3....@news-server.bigpond.net.au...

There is no standard function to do this, but writing the function is
trivial:

void trim( std::string& s )
{
std::string::reverse_iterator rit = s.rbegin();

while( rit != s.rend() && isspace(*rit) ) ++rit;

s.erase( rit.base(), s.end() );

std::string::iterator it = s.begin();

while( it != s.end() && isspace(*it) ) ++it;

s.erase( s.begin(), it );
}

--
David Hilsee

[Daniel T.]

"Chris" <c...@coelle.net> wrote:

>maybe someone could tell me what command I have to use for remove leading
>and trailing spaces.
>
>Is it trim()? Is there any #include or using neccesary?

You have to write trim yourself...

Here is what I did:

#include <string>

const std::string whiteSpaces( " \f\n\r\t\v" );

void trimRight( std::string& str,
const std::string& trimChars = whiteSpaces )
{
std::string::size_type pos = str.find_last_not_of( trimChars );
str.erase( pos + 1 );
}

void trimLeft( std::string& str,
const std::string& trimChars = whiteSpaces )
{
std::string::size_type pos = str.find_first_not_of( trimChars );
str.erase( 0, pos );
}

void trim( std::string& str, const std::string& trimChars = whiteSpaces )
{
trimRight( str, trimChars );
trimLeft( str, trimChars );
}